Due to its topography, the county has experienced inland flooding from at least 12 hurricane strength storms and numerous tropical systems since 1922. In addition, severe winter weather systems have caused significant coastal and inland flooding.
Flooding can occur from the ocean or rising waters of the Indian River, Banana River, St. John’s River, Mosquito Lagoon, Sykes Creek and Newfound Harbor. The majority of the land west of Interstate 95 makes up part of the St. John’s River
Valley flood plain.
The county is susceptible to short duration flooding, typical of a frontal system with short periods of rain. However, rainfall can be very intense and usually is associated with thunderstorms. Freshwater flooding occurs when an excessive amount of rainfall
accompanies a tropical storm or hurricane.
With the topography and high water table of Brevard County, drainage problems can make a small amount of rainfall very significant. Man-made alterations to the land have disrupted natural flow patterns and can lead to shallow flooding over a large area.
Lastly, coastal tidal flooding is generated from high tides and wind action and is a chronic problem within the coastal shoreline.
In Brevard County, extreme flooding events can occur throughout the County at any time of the year.